Erich von Stroheim
— Professor Winckler
Louis Jouvet
— Commissioner Calas
Jany Holt
— Hélène Ardouin
Albert Préjean
— André Laurent
Véra Flory
— Barmaid
Foun-Sen
— Winckler's assistant
Génia Vaury
— Barmaid
Made Siamé
— Calas's secretary
Roger Blin
— Kretz, Winckler's henchman
Philippe Richard
— John Gordon
Jean Témerson
— Jojo, Dany's friend
Maurice Baquet
— Gérard
Pierre Labry
— First inspector
Max Dalban
— Second inspector
Florence Marly
— Gordon's Mistress
Margo Lion
— Dany
Bobby Martin
— Jazz conductor
Thelma Minor
— Singer of the orchestra